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A hybrid h-bridge fault current limiter for HVDC grid protection

Xu, Jianzhong, Wu, Dongyi, Yan, Jun, Li, Gen and Zhao, Chengyong 2021. A hybrid h-bridge fault current limiter for HVDC grid protection. Presented at: IEEE 1st International Power Electronics and Application Symposium (PEAS 2021), Shanghai, China, 13-15 November 2021. 2021 IEEE 1st International Power Electronics and Application Symposium (PEAS). IEEE, pp. 1-6. 10.1109/PEAS53589.2021.9628646

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Abstract

For half-bridge modular multilevel converter (MMC) based HVDC grids, the fast clearance of DC faults can be achieved by DC circuit breakers (DCCBs). The hybrid fault current limiter (FCL) can be used to assist DCCBs for faster interruption less capacity. Thus, this paper proposes a novel Hbridge hybrid FCL to realize a tradeoff of comprehensive performance. The current commutation branch in the FCL can bidirectionally limit the rate-of-rise of the fault current during the current transfer stage. The working principle and the electrical stress analysis are presented and the impact of the hybrid FCL on the transient energy transfer is analyzed. These approaches are validated by simulations of a ± 500 kV bipolar HVDC grid in PSCAD/EMTDC. Results show that the proposed FCL can reduce the application of IGBTs and the requirement of MOV with the fast speed of fault isolation.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Date Type: Published Online
Status: Published
Schools: Engineering
Publisher: IEEE
ISBN: 9781665413602
Last Modified: 22 Feb 2022 15:00
URI: https://orca.cardiff.ac.uk/id/eprint/147439

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